time_nanosleep
Description
The time_nanosleep of Miscellaneous for PHP delay for a number of seconds and nanoseconds.
Syntax
time_nanosleep ( int $seconds , int $nanoseconds ) : mixed
Parameters
seconds
Must be a non-negative integer.
nanoseconds
Must be a non-negative integer less than 1 billion.
Note: On Windows, the system may sleep longer that the given number of nanoseconds, depending on the hardware.
Return
Returns TRUE on success or FALSE on failure.
If the delay was interrupted by a signal, an associative array will be returned with the components:
| seconds | number of seconds remaining in the delay |
| nanoseconds | number of nanoseconds remaining in the delay |
Examples
1
<?
// won't work as expected if an array is returned
if (time_nanosleep(0, 500000000)) {
echo "slept 0.5 seconds\n";
}
// better
if (time_nanosleep(0, 500000000) === true) {
echo "slept 0.5 seconds\n";
}
// best
$sleep = time_nanosleep(0, 500000000);
if ($sleep === true) {
echo "slept 0.5 seconds\n";
} elseif ($sleep === false) {
echo "sleep failed\n";
} elseif (is_array($sleep)) {
$seconds = $sleep['seconds'];
$nanoseconds = $sleep['nanoseconds'];
echo "interrupted by signal\n";
echo "time remaining: $seconds seconds and $nanoseconds nanoseconds";
}
slept 0.5 seconds slept 0.5 seconds slept 0.5 seconds